Needle blanks



2 SheetsSheet 1.

(No Model.)

t W. H. DAYTON.

MACHINE FOR SWAGING NEEDLE BLANKS.

No. 376,144. Patented Jan. 10, 1888..

2 Sheets-Sheet 2.

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' W. H. DAYTO;N.

MACHINE FOR SWAGING NEEDLE BLANKS. N0. 376,144.

Patented Jan. 10, v 1888.

N. PETERS Fhoto-Lilhographcn Washinglnn. u. c.

UNIT D STATES [PATENT Orrrce.

WILLIAM H. DAYTON, or ronnmeron, CONNECTICUT, Ass renon TO THE EXoELsIonNEEDLE COMPANY, on SAME PLACE.

MACHINE FOR SWAGING NEEDLE-BLANKS.

SPECIFICATION forming part of Letters Patent No. 376,144, dated January10, 1888.

Application filed March 28, 1887. Serial No. 232,672. (No model.) i

To aZZ whom it may concern.-

Be it kuownthat I, WILLIAM H. DAYTON, of Torrington, in the county ofLitchfield and State of Connecticut, have invented an Improvement inMachines for Swaging Needle- Blanks and other Articles, of which thefollowing is a specification.

My present invention is an improvement upon that for which LettersPatent No. 268,874 were granted to me December 12, 1882.

My present invention is especially available in manufacturing sewingmachine needle blanks in which the body of the needle is re duced so asto be of less diameter than the point. e

I provide'a holder into which the needleblank is to be received whilebeing reduced between the point and the shank, and the dies made useofare provided with springs and the die-followers have inclined faces,so that the dies are caused to approach toward each other as they arepressed back during the swaging operation.

In the drawings, Figure 1 is a vertical section of the swaging-machine.Fig. 2 is an elevation of the machine with the rings in front of therollers and dies removed. Fig. 3 is a plan, and Fig. 4 a section, of theblank-holder. Fig. 5 shows a section of the finished needle in magnifiedsize, and Figs. 6 and 7 show needle-blanks in magnified size.

The rotating shaft a,'shell b, and range of rollers Z within the rings aare substantially the same as in my aforesaid patent.

In sewing-machines, especially those that are driven rapidly by power,it is found that in sewing some materials the needle becomes heated byfriction. To avoid this the body of the needle above the eye has beenreduced in size, so as not to touch or rub upon the inner surface of thehole formed by the penetration of the point of the needle. I haveadapted my swaging-machine to the manufacture of articles-suoh assewing-machine needles-that are swaged of a smaller diameter at one partthan at another part. Io effect this object the followers are made widerthan the dies c, and the dies 0 are pressed forward by the springs 11,so that their front surfaces rest against the back surface of the ringfwhen in a normal of the holder.

position, and the faces of the followers 0 and of the dies 0 where theycome together are slightly inclined; hence when the springs 12 arecompressed by pushing the dies 0 backwardly the faces of the dies willbe brought closer together. I therefore am able to passin between thedies a cylindrical article, such as a previously-reduced needle-blank,such blank being contained in a suitable holder, and by pressing the endof the holder against the outer ends of the dies csuch dies aregradually pressed backwardly against the springs, and they approachcloser together as the reducing or swaging operations progress. In themanufacture of needle-blanks the wire is passed into one or moreswaging-machines--such as in aforesaid patentand reduced to the diameterof the needle at the point. Then the needleblank is placed in a holderthat allows the cylindrical portion of the needle-body to project theproper distance, and then the blank is passed in between the dies 0,which in their normal condition are suifrciently wide open for theneedle to pass freely between their faces, so that the point portion ofthe needleblank projects inwardly beyond the die-faces, and by pushingthe end of the holder against the outer ends of the dies as they revolvethe dies will be brought closer together and the body of the needle willbe red need, leaving the point portion of the needle-blank untouched.

In Fig. 6 I have shown a needle-blank after it is reduced to the propersize corresponding in diameter to the point of the needle, and in Fig. 7the needle-blank is represented after having been subjected to theswaging operation that reduces the body of the needle, these figuresbeing of a'magnified size, and in Fig. the finished needle is shown.

In Figs. 3 and 4 I have shown aholder that is well adapted to graspingthe needle-blanks and to moving the dies by an endwise pressure In thesefigures the rod has a handle, 21, aroundit, and there is a tubularstock, 22, at the end of the rod 20, and the 9 body 23 at the end of thestockis slotted atits edges to receive the jaws 24, that are pivotedupon the cross-pins 25, and their back ends are adjacent to thewedgeshaped end of the pin 26, that slides within the stock 22 andreceives its motion from the cam 27 and lever 28, swinging on thepivot-pin 50, such cam being in a cross-mortise in the stock 22, so thatwhen the cam-lever 27 28 is moved the pin 26 is pressed forward and itswedge shaped end is driven in between the back ends of the jaws 24 andtheir forward ends are swung together to grasp the needle-blank or otherarticle placed between them.

There is a gage-piece, 30, in a hole at the front end of the body 23 andin line with the faces of the jaws, and a screw, 31, to hold the pin inits proper place to form a stop for the needle-blank 33, that is placedin between the jaws.

jaws against the forward ends of the die'bloeks and forcing thembackwardly to cause them to approach nearer to each other and performthe operation of swaging the body of the needleblank, as aforesaid. Thejaws are opened by a spring as the pin 26 is released by swinging up thecam-lever. The clip or bow-spring 40 is a convenient form of spring foropening the jaws.

The holder may be pressed forward against the ends of the swaging-diesby any suitable mechanism acting at the back end of the rod 20, wherethere isa screw-sleeve and jam-nut to adjust the length of the holderand adapt the same to the parts with which it is conneeted.

I claim as my invention 1. The combination, with the shaft having at itsend a head with a cross-slot, of dies with adjacent die-faces,die-followers outside the dies, said dies and followers abutting byinclined contact-surfaces, springs to move the dies in one direction, ashell, and rollers to close the dies by the rotary movement of theparts, substantially as specified.

2. The combination, with the pair of swaging-dies, of a shaft having aslotted head for receiving such dies, die-followers with inclinedsurfaces in contact with the dies, a shell around the dies, and a rangeof rollers for acting on the dies, a holder for the blank that is to beacted on, and which holder is adapted to be pressed against the dies tomovethein endwise, substantially as set forth.

Signed by me this 24th day of March, 1887.

\V. H. DAYTON.

Witnesses:

G120. T. PINCKNEY, \VILLIAM G. MOTT.

